Hyperbranched poly(amideamine) (HBPAA)-capped Au and Ag nanoparticles (NPs) were synthesized by hydrothermal reduction and then
embedded into calcium alginate fibers (CAFs) by HBPAA-directed self-assembly and cation exchange between Ca2+ and HBPAA in aqueous
solution to produce an Ag/Au-embedded coating inside the fiber surface. Transmission electron microscopy tests showed that as-prepared Au
and Ag NPs possessed positive zeta potential (+34 and +13.5 mV) and had a regular spherical structure with an average particle size of 11.1 and
10.8 nm